NEW YORK, May 26 : The dollar firmed on Tuesday as renewed U.S. strikes on Iran dented optimism for a near-term ceasefire, boosting demand for the greenback as investors turned cautious.Iran said the U.S. had violated a ceasefire after it conducted what it called defensive strikes in southern Iran, while U.S.

The dollar strengthened against all its Group-of-10 peers, while gold erased earlier gains to fall 0.5% to about $4,545 an ounce

NEW YORK, May 26 : The dollar firmed on Tuesday as renewed U.S. strikes on Iran dented optimism for a near-term ceasefire, boosting demand for the greenback as investors turned…